Nail brush



FIG. 1 is a perspective view of a front, top, and right side of an design for a nail brush;

FIG. 2 is a perspective view of a rear, top, and left side of the nail brush of FIG. 1;

FIG. 3 is a perspective view of a front, bottom, and right side of the nail brush of FIG. 1;

FIG. 4 is a right side elevational view of the nail brush of FIG. 1;

FIG. 5 is a left side elevational view of the nail brush of FIG. 1;

FIG. 6 is a front elevational view of the nail brush of FIG. 1;

FIG. 7 is a rear elevational view of the nail brush of FIG. 1;

FIG. 8 is a top plan view of the nail brush of FIG. 1; and,

FIG. 9 is a bottom plan view of the nail brush of FIG. 1.

The dash-dash-dash lines are included for the purpose of illustrating portions of the nail brush that form no part of the claimed design. 

CLAIM The ornamental design for a nail brush, as shown and described. 